Ex-shadow work and pensions secretary Owen Smith is due to launch his Labour leadership campaign and is warning the party is in "deep peril" and may split.

In response, Momentum - the grassroots group which supports Corbyn - suggested that it may provide funds for its own members to vote in the leadership race.

The Pontypridd MP and former Shadow Work and Pensions Secretary said in an interview with The Guardian that the British electorate should be allowed a say after a new deal with the European Union was struck.

On Wednesday Cameron will face Corbyn one last time at Prime Minister's Questions time in the Commons.

Attempting to engage the left of the Labour party, leadership contender Angela Eagle has given a speech in which she has tried to sooth tension within the party. "That does mean a second referendum or a general election when the terms are clear", Smith said.

Many are thought to have reacted to calls from its leader, Len McCluskey, to stop what he has called an anti-democratic coup against Corbyn.

Britain's opposition Labour leader Jeremy Corbyn yesterday won a crucial victory against rebels seeking to unseat him, after the party's executive committee ruled he would automatically be included on a leadership ballot. "And I am determined to win it".

GETTYMs Eagle said Mr Corbyn must do more to stop the acts of violence and abuse

The MP for Pontypridd says Labour needs both a "radical and credible" leader and claims said he could "heal" the party.

As jubilant supporters cheered Mr Corbyn, he told reporters: "I'm sure Labour MPs will understand that the party has to come together in order to present to the British people the options of a different and better way of doing things".

Anyone can become registered supporters - giving them a one-off vote - if they pay £25 and "share" Labour's aims and values.

Michael Foster, whose family gave £400,000 to the party, said he was anxious about "apparent manipulation" of the rules by Labour's ruling body, the National Executive Committee (NEC).

On Tuesday the party ruled he had the automatic right to stand in the contest without needing to be nominated by lawmakers.

"It is extremely concerning that Angela Eagle has been the victim of a threatening act and that other MPs are receiving abuse and threats", Corbyn said in an e-mailed statement.

The victor of the contest, which will formally get underway with an announcement of the timetable on Thursday, is expected to be crowned in September.